Improvement in packing-rings



UNITED' STATES PATENT OFF-Ion.

SAMUEL HUGHES, OF CHARLESTON, SOUTH CAROLINA.

IMPROVEMENT IN PACKING-RINGS.

Specification forming part of Letters Patent No. 173,638, dated February 15, 1876; application filed A January 14, 1876.

To all 'whom it may concern: As a portion of the liquid escapespast the Be it known that I, SAMUEL HUGHES, of .piston or plunger E, it will enter an opening Charleston, in the county of Charleston and leading into the cup-packing, and there ex- State of South Carolina, have invented cerpand the packing, and force the wearing-ring `tain new 'and useful Improvements in Pack- D tightly against thepiston.

ing for Engines ;k and I do hereby declare the When the wearing-ring becomes worn, it following to be a full, clear, and exact decan easily be replaced by a new one, without scription ot' the invention', such as will enadisturbing the rest of the packing.

ble others skilled in the art towhich it per- In Fig. 2 the cup-packing and wearing-ring tains to make and use it, reference being had are secured to the end ot' the plunger, and to the accompanying drawings, whichv form there retained by a detachable plate,- F. In part ot' this specitication. this case the liquid forces the wearing-ringout Figure l is a vertical section of a pump-cylagainst the cylinder. y Y inder and my improved packing located in a In Fig. 4 the cup packing Gis formed with recess in the cylinder.V Fig. 2 is a vertical portion a snugly fitting within groove B, section of a cylinder andpiston, and my ilnwhile the other portion, a, of the packing is proved packing .combined with the piston. made enough shorter to allow liquid ,to enter Fig. 3 is a section of the packingrings. Figs. beneath Wearing-ring D, through opening b, 4 and 5 are modified forms vot' packing-rings. and expand the cup-packing to force the Heretoi'ore cuppackings have been used in wearing-ring D against the pistonor plunger. hydraulic engines; but from their construcrIhe form of packing shown in Fig. 5 differs tion and arrangement, relative to the cylinder from that shown in Fig. 4 onlyin one feature, or piston, the outer surface of the packing and that relates to the method of securing the sustains all of the wear, and 'as that portion ot' wearing-rin g tothe outer surface of the cupthe packing subjected to wear is of necessity packing. y of limited thickness, in order that it may re- As the latter is usually made ot' rubber, a spond to the-pressure of liquid in the rear ot' rib, d, may be formed ,on its outer periphery, the same, it follows that the entire packingand a groove, c, upon the inner surface of'l the ring must often be replaced by a new one. wearingring D. When the several parts are The object of my invention is to avoid thel pla-ced in position, the wearing-ring is predifculties above enumerated, and furnish a vented from slipping down and closing opencup-packing oi' such a construction that the ing b, and therefore this construction insures same, when worn, can.be renewed without a tight joint under any circumstances that disturbing any other than the wearing-surface may arise. otl the packing; and to that end my invention Having fully described my invention, what consists in the combination, with cup-packing -I claim, and desire to secure by Letters Patplaced in a cylinder' orY piston, of an inde ent, is pendent wearing-ring, substantially as herein- The combination, with acup-packing, of an after set forth. l independent wearing-ring, substantially as In the accompanying drawings, A is the and for the purpose described. cylinder, having a'groove, B, within which is In testimony that I claim. the foregoing I placed the cup-packing C', formed of any suit- -have hereunto set my hand this 8th day of able flexible material. Against the inner sur- January, 187 6. face of packing Ois placed a wearing-ring, D, vpreferably. of ibrous or flexible material, Witnesses: although a steel split ring might be used in Trios. B. HALL, some cases. r ALBERT W. BRIGHT.

SAMUEL HUGHEs. 

